OFFSET
1,1
COMMENTS
a(9) = (19^163 - 17^163)/2 is too large to include here.
Corresponding values of k (odd primes) are listed in A122478.
CROSSREFS
KEYWORD
hard,nonn
AUTHOR
Alexander Adamchuk, May 05 2010
EXTENSIONS
Edited by Max Alekseyev, May 16 2010
STATUS
approved